docs: def _build_string_type(var, property_path=None):
      """ Builds schema definitions for string type values.
  
      :param var: The string type value
      :param List[str] property_path: The property path of the current type,
          defaults to None, optional
      :param property_path: [type], optional
      :return: The built schema definition
      :rtype: Dict[str, Any]
      """
  
      if not property_path:
          property_path = []
  
      schema = {"type": "string"}
      if is_builtin_type(var):
          return schema
  
      if is_regex_type(var):
          schema["pattern"] = var.__supertype__.pattern
          return schema
  
      if is_config_var(var):
          schema.update(
              _build_attribute_modifiers(var, {"min": "minLength", "max": "maxLength"})
          )
          if is_regex_type(var.type):
              schema["pattern"] = var.type.__supertype__.pattern
  
      return schema